Anti-overturning structure of small-radius curve steel box girder

Abstract

The utility model provides an anti-overturning structure of a small radius curve steel box girder, which is used for connecting the steel box girder and a bridge pier, and relates to the technical field of bridge construction, the anti-overturning structure comprises a pre-buried fixed part, two supports and a plurality of anti-overturning pull rods, the two supports are both supported between the steel box girder and the bridge pier, a gap is arranged between the two supports, and the anti-overturning pull rods are arranged on the pre-buried fixed part. The pre-embedded fixing parts are pre-embedded in the bridge pier, anti-overturning pull rods are arranged on the two sides of each support respectively, each anti-overturning pull rod comprises a pull rod body and two tensioning parts, the two tensioning parts are arranged at the two ends of the pull rod body respectively, one tensioning part tensions one end of the pull rod body to the steel box girder, and the other tensioning part tensions the other end of the pull rod body to the steel box girder. And the other tensioning piece is used for tensioning the other end of the pull rod body on the embedded fixing piece. The anti-overturning structure of the small-radius curve steel box girder can provide anti-pulling constraint for the small-radius curve steel box girder and prevent the steel box girder from overturning.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge construction technical field, especially a kind of anti-overturning structure of small radius curve steel box girder. BACKGROUND

[0002] Urban elevated road system includes a large number of highway overpass, large interchange ramp bridge, and ramp curve continuous beam bridge is the key to realize the connection turning function on the interchange. Considering the dense distribution of surface structures and the complex demand of ground traffic, the ramp often selects small radius curve alignment and adopts steel box girder structure.

[0003] Steel box girder has good bending resistance, reliable torsional resistance and large spanning capacity. However, compared with straight steel box continuous beam bridge, curved steel box continuous beam bridge has lighter self weight and more complex stress characteristics. Under the action of vehicle load, especially the load of one-way driving vehicle, large bending torsional stress and strain and constrained torsional deformation are generated, which further causes uneven stress distribution of main beam section and distortion effect, and easily causes overturning of small radius curve steel box continuous beam bridge. In reality, heavy vehicle column often drives or parks on one side, which finally leads to overall overturning of beam body.

[0004] Therefore, the present inventors, based on years of production and design experience in this field and related fields, have designed an anti-overturning structure of small radius curve steel box girder through repeated tests, in order to solve the problems existing in the prior art. SUMMARY

[0005] The utility model discloses a kind of anti-overturning structures of small radius curve steel box girder, which can provide anti-pulling constraint for small radius curve steel box girder and prevent the overturning of steel box girder.

[0006] To achieve the above object, the utility model provides an anti-overturning structure of small radius curve steel box girder for connecting steel box girder and pier, wherein the anti-overturning structure includes embedded fixing piece, two supports and multiple anti-overturning pull rods, the two supports are supported between the steel box girder and the pier, and there is a gap between the two supports, the embedded fixing piece is embedded in the pier, and each support is provided with anti-overturning pull rods on both sides, the anti-overturning pull rod includes pull rod body and two tensioning pieces, the two tensioning pieces are arranged at both ends of the pull rod body, one tensioning piece tightens one end of the pull rod body on the steel box girder, and the other tensioning piece tightens the other end of the pull rod body on the embedded fixing piece.

[0007] The overturning-resistant structure of the small-radius curved steel box girder as described above, wherein the embedded fixing member comprises two fixing plates, the two fixing plates are horizontally arranged and respectively arranged below the two supports, and the pull rod body penetrates the fixing plates vertically.

[0008] The overturning-resistant structure of the small-radius curved steel box girder as described above, wherein a plurality of anchoring ribs are respectively fixed on each of the fixing plates.

[0009] The overturning-resistant structure of the small-radius curved steel box girder as described above, wherein the anchoring ribs are inverted U-shaped.

[0010] The overturning-resistant structure of the small-radius curved steel box girder as described above, wherein the pull rod body comprises a first rod body, a screw cylinder and a second rod body which are coaxially arranged and sequentially connected, and the first rod body and the second rod body are respectively screwed with the screw cylinder.

[0011] The overturning-resistant structure of the small-radius curved steel box girder as described above, wherein the tensioning member comprises a gasket plate and a compression nut, the first rod body penetrates the bottom plate of the steel box girder, the gasket plate and the compression nut in sequence, the compression nut is screwed with the first rod body and compresses the gasket plate on the bottom plate.

[0012] The overturning-resistant structure of the small-radius curved steel box girder as described above, wherein the tensioning member comprises a gasket plate and a compression nut, the second rod body penetrates the embedded fixing member, the gasket plate and the compression nut in sequence, and the compression nut is screwed with the second rod body and compresses the gasket plate on the embedded fixing member.

[0013] Compared with the prior art, the overturning-resistant structure of the small-radius curved steel box girder has the following characteristics and advantages:

[0014] The overturning-resistant structure of the small-radius curved steel box girder provided by the utility model is provided with overturning-resistant pull rods on both sides of the support for supporting the steel box girder, the overturning-resistant pull rods are connected with the embedded fixing member embedded in the pier, the overturning-resistant pull rods provide uplift restraint for the steel box girder, and the overturning damage process of the steel box girder bridge is delayed. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings described herein are only for illustrative purposes and are not intended to limit the scope of the utility model disclosure in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only illustrative and are used to help understand the utility model, and are not specific limitations on the shapes and proportional dimensions of the components of the utility model. Those skilled in the art can select various possible shapes and proportional dimensions to implement the utility model according to specific circumstances under the guidance of the utility model.

[0016] Figure 1 The drawing is a schematic view of the overturning-resistant structure of the small-radius curved steel box girder provided by the utility model.

[0017] Figure 2 It is the structure schematic view of anti-overturning pull rod in the utility model;

[0018] Figure 3 It is the structure schematic view of pre-buried fixing part in the utility model;

[0019] Figure 4 It is the structure schematic view of support in the utility model.

[0020] Explanation of reference signs

[0021] 100, anti-overturning structure; 10, steel box girder;

[0022] 11, bottom plate; 20, pier;

[0023] 30, pre-buried fixing part; 31, fixed plate;

[0024] 32, anchoring rib; 321, anchoring upper nut;

[0025] 322, anchoring lower nut; 40, support;

[0026] 401, upper sleeve; 402, lower sleeve;

[0027] 403, support upper anchoring bolt; 404, support lower anchoring bolt;

[0028] 405, leveling steel plate; 406, support body;

[0029] 50, anti-overturning pull rod; 51, pull rod body;

[0030] 511, first pull rod; 512, screw cylinder;

[0031] 513, second pull rod; 52, tensioning part;

[0032] 521, pad plate; 522, compression nut;

[0033] 523, first rod body compression sleeve; 524, second rod body compression sleeve. DETAILED DESCRIPTION

[0034] The details of the utility model can be understood more clearly in combination with the description of the specific embodiments of the utility model and the accompanying drawings. However, the specific embodiments of the utility model described herein are only used for the purpose of explaining the utility model, and cannot be understood as limiting the utility model in any way. Under the guidance of the utility model, the skilled person can conceive any possible deformation based on the utility model, and these should be regarded as belonging to the scope of the utility model.

[0035] Unless the direction indicated by the definition is separately defined, the up, down, left, right and other directions referred to in this article are based on the up, down, left, right and other directions of the utility model shown Figure 1 are described herein.

[0036] As Figures 1 to 4 shown in the utility model, a kind of overturning resistance structure 100 of small radius curve steel box girder is provided, for connecting steel box girder 10 and pier 20, overturning resistance structure 100 includes pre-buried fixing piece 30, two supports 40 and multiple overturning resistance pull rods 50, two supports 40 are supported between steel box girder 10 and pier 20, and two supports 40 have interval between, pre-buried fixing piece 30 is pre-buried in pier 20, and two sides of each support 40 are respectively provided with overturning resistance pull rod 50, overturning resistance pull rod 50 includes pull rod body 51 and two tensioning pieces 52, two tensioning pieces 52 are respectively arranged at both ends of pull rod body 51, one tensioning piece 52 is tensioned on steel box girder 10 at one end of pull rod body 51, and the other tensioning piece 52 is tensioned on pre-buried fixing piece 30 at the other end of pull rod body 51.

[0037] The overturning resistance structure 100 of small radius curve steel box girder provided by the utility model supports steel box girder 10 through two supports 40, and sets overturning resistance pull rod 50 on both sides of support 40 respectively, each overturning resistance pull rod 50 is connected with pre-buried fixing piece 30 pre-buried in pier 20, to provide uplift restraint for steel box girder 10, and further delay the overturning damage process of bridge.

[0038] In the utility model, steel box girder 10 is small radius curve steel box girder, and small radius curve steel box girder refers to the steel box girder structure with relatively small curve radius (usually below 200 meters).

[0039] In an optional embodiment of the utility model, the top surface of pier 20 is provided with two supports 40, and the two supports 40 are symmetrically arranged on both sides of the axis line of steel box girder 10. The two supports 40 arranged at intervals jointly bear the torque, so that the torque of steel box girder 10 is evenly distributed.

[0040] In an optional embodiment of the utility model, multiple overturning resistance structures 100 are arranged along the direction of the axis line of steel box girder 10 (i.e. the length direction of the curve continuous beam of bridge). By using the above structure, two rows of supports 40 are arranged below the curve continuous beam of bridge, and one row of overturning resistance pull rods 50 is symmetrically arranged on both sides of each row of supports 40, so as to ensure the overturning resistance performance of the whole bridge.

[0041] Preferably, the connecting lines of the overturning resistance pull rods 50 on both sides of support 40 are perpendicular to the axis line of steel box girder 10, so as to further improve the uplift resistance of overturning resistance structure 100.

[0042] Further, the arrangement curve radian of each row of the overturning-resistant pull rod 50 is consistent with the curve radian of the steel box girder 10.

[0043] In an optional embodiment of the utility model, the embedded fixing part 30 comprises two fixed plates 31, the two fixed plates 31 are horizontally arranged and respectively arranged in the lower side of the two supports 40, and the pull rod body 51 vertically penetrates the fixed plate 31. When the steel box girder 10 is pressed down, the steel box girder 10 is pressed down along the pull rod body 51, the pull rod body 51 is not stressed, and the downward pressure of the steel box girder 10 is directly dispersed to the support 40. When the steel box girder 10 is laterally tilted, the overturning-resistant pull rod 50 provides the pull-out restraint for the steel box girder 10 to delay the overturning damage process of the steel box girder 10.

[0044] In an optional example of the embodiment, a plurality of anchoring ribs 32 are respectively fixed on each fixed plate 31. The anchoring rib 32 is connected with the pier 20 by adhesive force to increase the connection strength of the fixed plate 31 and the pier 20.

[0045] In an optional example, the anchoring rib 32 is in inverted U shape.

[0046] In an optional example of the embodiment, the fixed plate 31 is a steel plate, the anchoring rib 32 is a reinforcing bar, and the fixed plate 31 and the anchoring rib 32 are welded.

[0047] In an optional embodiment of the utility model, the pull rod body 51 comprises a first rod body 511, a screw cylinder 512 and a second rod body 513 arranged in sequence, and the first rod body 511 and the second rod body 513 are respectively screwed with the screw cylinder 512. The pull rod body 51 with the double-end bolt structure can be installed on the steel box girder 10 and embedded in the pier 20, and the first rod body 511 and the second rod body 513 are pulled tight and welded and fixed through the screw cylinder 512, so that the pull-out resistance of the overturning-resistant pull rod 50 is realized, and the installation of the overturning-resistant pull rod 50 is facilitated. When the overturning-resistant pull rod 50 is installed, the positioning of the pier 20 and the steel box girder 10 is completed first, then the first rod body 511 and the second rod body 513 are pulled tight and welded and fixed through the screw cylinder 512.

[0048] In an optional example of the embodiment, the tightening member 52 comprises a backing plate 521 and a compression nut 522, the first rod body 511 penetrates the bottom plate 11 of the steel box girder 10, the backing plate 521 and the compression nut 522 in sequence, and the compression nut 522 is screwed with the first rod body 511 and compresses the backing plate 521 on the bottom plate 11.

[0049] In an optional example, the bottom plate 11 is provided with a hole seat for mounting the first rod body 511, the top end of the first rod body 511 vertically penetrates the hole seat and is screwed with the compression nut 522, the bottom surface of the gasket plate 521 is compressed to the top surface of the hole seat, and the bottom surface of the compression nut 522 is compressed to the top surface of the gasket plate 521.

[0050] Further, the outer diameter of the gasket plate 521 is greater than the diameter of the first rod body 511, and the gasket plate 521 is compressed on the gasket plate 521 by the compression nut 522.

[0051] In an optional example of the embodiment, the tensioning member 52 includes the gasket plate 521 and the compression nut 522, the second rod body 513 penetrates the embedded fixing member 30, the gasket plate 521 and the compression nut 522 in sequence, the compression nut 522 is screwed with the second rod body 513 and compresses the gasket plate 521 on the embedded fixing member 30. The bottom end of the second rod body 513, the gasket plate 521, the compression nut 522 and the embedded fixing member 30 are integrally cast in the pier 20.

[0052] In an optional embodiment of the utility model, the tensioning member includes a first rod body compression sleeve 523 and a second rod body compression sleeve 524.

[0053] In an optional embodiment of the utility model, the specific structure of the support 40 is a basin type rubber support, the support includes an upper sleeve 401 and a lower sleeve 402, a support upper anchoring bolt 403 and a support lower anchoring bolt 404, a leveling steel plate 405 and a support body 406. The upper sleeve 401 is fixedly connected to the upper end of the support body 406 through the support upper anchoring bolt 403, and the leveling steel plate 405 is arranged between the upper sleeve 401 and the support body 406, the support upper anchoring bolt 403 penetrates the leveling steel plate 405 to fix the leveling steel plate 405 and the support body 406 together, and the lower sleeve 401 is fixedly connected to the lower end of the support body 406 through the support lower anchoring bolt 404.

[0054] In an optional embodiment of the utility model, the embedded fixing member 30 includes a fixed plate 31, an anchoring rib 32, an anchoring upper nut 321 and an anchoring lower nut 322.

[0055] The anti-overturning structure 100 of the small-radius curve steel box girder adopts two supports 40 to bear the torque, so that the torque of the bridge is evenly distributed on the curve continuous beam and is borne by the two supports 40 on each pier 20; in addition, the anti-overturning pull rod 50 is adopted to resist overturning, and after the anti-overturning pull rod 50 is installed, the effect of resisting pull and not resisting compression is achieved, so that the internal force dispersion to the two supports 40 is not affected, and at the same time, an anti-pulling effect can be provided when overturning. The embedded fixing part 30 is connected with the pier concrete of the pier 20 through the anchoring rib 32, so that the tensile capacity of the anti-overturning pull rod 50 is increased, the anti-overturning capacity of the steel box girder 10 is improved, and the smooth traffic of the traffic can be ensured.

[0056] The detailed explanation of each embodiment is only for the purpose of explaining the utility model, so as to better understand the utility model, but these descriptions cannot be interpreted as a limitation of the utility model for any reason, especially, the features described in different embodiments can be arbitrarily combined with each other to form other embodiments, except for the explicit opposite description, these features should be understood as applicable to any one embodiment, and not limited to the described embodiments.

Claims

1. A overturning-resistant structure of a small-radius curve steel box girder for connecting a steel box girder and a pier, characterized by, The anti-overturning structure comprises embedded fixing members, two supports and a plurality of anti-overturning pull rods, the two supports are supported between the steel box girder and the bridge pier, and the two supports have a spacing therebetween, the embedded fixing members are embedded in the bridge pier, and each of the supports is provided with anti-overturning pull rods on both sides thereof, the anti-overturning pull rod comprises a pull rod body and two tensioning members, the two tensioning members are arranged at both ends of the pull rod body, one of the tensioning members is used to tension one end of the pull rod body on the steel box girder, and the other tensioning member is used to tension the other end of the pull rod body on the embedded fixing member.

2. The overturning-resistant structure of a small-radius curved steel box girder according to claim 1, characterized in that, The embedded fixing member comprises two fixing plates, the two fixing plates are arranged horizontally and are arranged below the two supports in a position-locked manner, and the pull rod body penetrates the fixing plates vertically.

3. The overturning-resistant structure of a small-radius curved steel box girder according to claim 2, characterized in that, A plurality of anchoring ribs are fixed on each of the fixing plates.

4. The overturning-resistant structure of a small-radius curved steel box girder according to claim 3, characterized in that, The anchoring rib is in an inverted U shape.

5. The overturning-resistant structure of a small-radius curved steel box girder according to claim 1, wherein The pull rod body comprises a first rod body, a screw cylinder and a second rod body which are coaxially arranged and sequentially connected, and the first rod body and the second rod body are threadedly connected with the screw cylinder.

6. The overturning-resistant structure of a small-radius curved steel box girder according to claim 5, characterized in that, The tensioning member comprises a backing plate and a compression nut, the first rod body penetrates the backing plate and the compression nut in sequence, and the compression nut is threadedly connected with the first rod body and compresses the backing plate on the bottom plate of the steel box girder.

7. The overturning-resistant structure of a small-radius curved steel box girder according to claim 5, wherein The tensioning member comprises a backing plate and a compression nut, the second rod body penetrates the backing plate and the compression nut in sequence, and the compression nut is threadedly connected with the second rod body and compresses the backing plate on the embedded fixing member.

8. The overturning-resistant structure of a small-radius curved steel box girder according to claim 1, characterized in that, The tensioning member comprises a first rod body compression sleeve and a second rod body compression sleeve.

9. The overturning-resistant structure of a small-radius curved steel box girder according to claim 1, wherein The support comprises an upper sleeve and a lower sleeve, upper and lower anchoring bolts, a leveling steel plate and a support body.

10. The overturning-resistant structure of a small-radius curved steel box girder according to claim 1, characterized in that, The embedded fixing member comprises an embedded steel plate, anchoring ribs, an upper anchoring nut and a lower anchoring nut. The embedded fixing member comprises an embedded steel plate, anchoring ribs, an upper anchoring nut and a lower anchoring nut.

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